while (true) { System.gc(); /** * Verify Full GC with the -verbose:gc option * We expect the map to be emptied as the strong references to * all the keys are discarded. */ System.out.println("map.size(); = " + map.size() + " " + map); } }}

What do we expect the size of the map to be after full GC? I initially thought it should be empty. But it turned out to be 2.

Look at the way the four Strings are initialized. Two of them are defined using the 'new'operator, whereas the other two are defined as literals. The Strings defined using the 'new' operator would be allocated in the Java heap, but the Strings defined defined as literals would be in the literal pool.The Strings allocated in the literal pool (Perm Space) would never be garbage collected.This would mean that String 'str2' and 'str3' would always be strongly referenced and the corresponding entry would never be removed from the WeakHashMap.

So next time you create a 'new String()', put it as a key in a WeakHashMap, and later intern() the String, beware - Your key will always be strongly referenced. [Invoking intern() method on a String will add your String to the literal pool if some other String equal to this String does not exist in the pool]

It was amazing to read many good advice in this review. To improve the business it suggested to use outsourcing software development services to release on IT markets. Software development allows to automate business processes and earn more profit funds.

Vehicle title advances are not for everybody. They work for those shoppers who are in the situation to pay back what they obtained when expected yet for the individuals who can't? It's best to avoid acquiring against your auto and discover another approach to get the assets you require. aaa1autotitleloans.com/chicago